Reenforcing bar



Oct, L 1935. 5 WHITE 2,016,128

REENFORCING BAR Filed Sep'b. 14, 1932 2 Sheets-Sheet l Patented Oct. 1, 1935 UNITED STATES PATENT OFFICE REENFORCING BAR William E. White, Bethlehem, Kalman Steel Corporation,

Delaware Pa., assignor to a corporation of Application September 14, 1932, Serial No. 633,150

16 Claims.

' formed on opposite surfaces of the bar, each rib extending substantially half way around the bar, and formed in such a manner that they can be more easily rolled in a two high mill.

Another obect of my invention relates to a cylindrical reenforcing bar with sinuous ribs formed thereon having a uniform cross sectional area and of uniform tensile strength throughout the length of the bar.

Another object of my invention relates to a cylindrical reenforcing bar having a straight longitudinal reenforcing rib on opposite surfaces thereof with a sinuous rib extending longitudinally of the bar from the base of one of the straight longitudinal ribs to the other 'on opposite surfaces of the bar.

Another object of my invention relates to forming the apices of the sinuous ribs in such a manner that they will have the same cross sectional area transversely of the bar as the zigzag inclined portions of the ribs.

Other objects of my invention will appear from the following description taken in connection with the accompanying drawings in which like characters of reference indicate like parts.

Figure l is a top plan view of a portion of one form of bar illustrating my invention.

Figure 2 is a transverse sectional view of the bar taken through the apices of the ribs on the line 2-2 of Fig. 1.

Figure 3 is a transverse sectional view of the bar taken through the inclined portions of the ribs on the line 3--3 of Fig. 1.

Figure 4 is a cross sectional view through the inclined portion of one of the ribs at right angles thereto, taken on the line 4-4 of Figure 1.

Figure 5 is a top plan view of a modified form of bar comprising a cylindrical body portion with sinuous ribs extending longitudinally of the bar on the top and bottom surfaces thereof in a similar manner to those shown in Fig. 1, but showing an additional straight longitudinal rib on each side of the bar between the sinuous ribs.

Fig. 6 is a transverse section of the modified form of bar shown in Fig. 5 taken on the line 66 of Fig. 5, illustrating the manner of rolling the 5 bar in a finishing roll pass of a two high mill, and Fig. 7 is a transverse section taken on the line l---'! of Fig. 5.

Referring now to the numbers of reference on the drawings and first to Figs. 1 to 4, the numer- 10 al I indicates the cylindrical body portion of the bar, 2 a sinuous or zigzag rib formed on the top and bottom surfaces of the bar. The apices of the sinuous rib on the top of the bar being illustrated in staggered relation and centrally disposed to the apices of the sinuous rib on the bottom of the bar, but I wish it understood that this position may be varied or the ribs may be formed in transverse alignment opposite each other if desired without departing from the spirit of my invention.

.The sinuous ribs each extend longitudinally of the bar and substantially from one side surface of the bar to the other, having inclined portions 3, with a blunt apex portion 4, rounded corners 5, inclined sides 6 and fillets l, at the base thereof where they join the cylindrical body portion of the bar. The apices of the ribs are made somewhat narrower at the top as at 8, the

inner walls being formed radially as at 9, while the outer surface extends tangentially as at I0 from the top rounded corner to the cylindrical side surface of the bar in this manner the base of the apices of the ribs are of considerably greater width than that of the width of the longitudinally inclined portions of the ribs, but the cross sectional area will be the same in each case as indicated in Figs. 2 and 3 of the drawings.

Referring now to Figs. 5 to 7 inclusive, in which a cylindrical bar H is illustrated, having a straight longitudinal rib [2 formed on diametrically opposite surfaces of the bar otherwise the construction of the bar with the sinuous ribs formed thereon is the same as the bar shown in Figs. 1 to 4 and the same description and reference numerals will apply thereto.

It will be'noted that if the sinuous ribs 2 had the same contour throughout their length a transverse sectional area through the bar at the apex portions where it would extend straight across the ribs on the lines 22 and 6-6 as in Figs. 1 and 5, respectively, would be the same as shown in Fig. 4 of the drawings, while a section taken through the longitudinally inclined portion of the easily rolled in a two high mill as will be noted a Another object in forming the outer surfaces of the apex portions tangential to the side sur- I faces of the bar is to. allow the bar to be more by referring to Fig. 6 of the drawings in which 13 and i l indicate a portionof a pair of rolls in section having grooves therein as at l5 and $3, indicating a finishing roll pass for the bar. Heretofore some difficulty has been experienced in rolling cylindrical bars with ribs formed thereon which extend around the side surfaces of the bar for the reason that the groove in the roll pass extended at such an angle that the rib at the side of the bar after issuing from the pass would be burred or otherwise distorted, but in forming the apices of the sinuous ribs in the manner illustrated obviates this difiiculty and produces a bar of uniform cross sectional area with a sinuous rib extending substantially half way around the bar on opposite surfaces, adapted to form the desired mechanical bond when embedded in concrete or like substance.

f For illustration in the drawings, I have shown my improved bar as having sinuous ribs extending longitudinally of the bar in a zigzag manner to and from opposite side surfaces of the bar at an angle of substantially 45, but I wish it understood that this inclination may be changed so as to beat a greater or. less degree of angularity and the thickness of the apices may be changed to conform with the cross sectional area of the longitudinally inclined ribs, or the inclination of the outer or inner surfaces of the apices changed to conform therewith so that the bar will have the same cross sectional area throughout its length if desired and still come within the scope of my invention.

Although I have shown and described my invention in considerable detail, I do not wish to be limited to the exact and specific details shown and described, but may use such substitution,

, modifications or equivalents thereof, as are embraced within the scope of my invention, as pointed out in the claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A bar having a cylindrical body portion, and a sinuous rib formed thereon provided with apices having radial inner side surfaces and outer side surfaces extending tangentially from thetop of the rib to the side surface of the cylindrical body portion of the bar.

2. A bar having a cylindrical body portion, and a sinuous rib formed on opposite surfaces of the cylindrical body portion provided with apices 4. A reenforcing bar for concretestructures or the like, comprising a cylindrical body portion, and a sinuous rib extending substantially to the opposite side surfaces of the bar and provided with apices the outer surfaces of which extend tangentially to the cylindrical side surface of the body portion of the bar.

5. A reenforcing bar of uniform cross sectional area throughout its length, comprising a cylindrical body portion and oppositely disposed sinuous ribs extending longitudinally thereof the full width of the bar, said sinuous ribs having the outer surfaces of their apices formed tangentially to the side cylindrical surfaces of the bar.

6. A reenforcing bar for concrete structures or the like, comprising a cylindrical body portion, and a sinuous rib formed on the bar provided with inclined portions and thickened apices the outer surfaces of which extend tangentially to the surfaces of the body portion of the cylindrical bar.

'7. A reenforcing bar for concrete structures or the like, comprising a cylindrical body portion, and oppositely disposed sinuous ribs'formed thereon, each extending longitudinally thereof the full diameter of the bar, said ribs having inclined portions and thickened apices the outer surfaces of each of said apices extend tangentially from the surface of the body portion of the cylindrical bar to the top of the rib.

8. A reenforcing bar for concrete structures or the like, comprising a cylindrical body portion, and oppositely disposed sinuous ribs, extending longitudinally of the bar through substantially 18o" thereof, said sinuous ribs having inclined portions and apices provided with blunt top surfaces and inclined side surfaces, the blunt top of the apices being narrower than the blunt tops of the inclined portions, the base of the apices being wider than the base of the inclined portions, and the outer surfaces of the apices being formed tangentially to the surfaces of the cylindrical face of the bar.

9. A reenforcing bar for concrete structures or r the like comprising a cylindrical body portion, straight longitudinal- -diametrically opposed ribs formed thereon, and longitudinally extending sinuous ribs on oppositesides of the bar between the straight longitudinal ribs, said sinuous ribs provided with fillets at their apices the outer surfaces of which extend tangentially to the cylindrical sides of the bar. 7

10. A reenforcing bar for concrete structures or the like, comprising a cylindrical body portion provided with straight diametrically oppositely opposed ribs, a longitudinally extending sinuous rib formed on each side of the'bar between the straight ribs, said sinuous ribs having thickened arcuately formed apices, and outer surfaces formed at the apices of the sinuous ribs extending tangentially from the top of the rib to the cylindrical sides of the body portion, and terminating at a point at the base of the straight longitudinal ribs.

11. A reenforcing bar for concrete structures or the like, comprising a cylindricalbody portion, a plurality of longitudinal ribs projecting laterally therefrom, and a sinuous rib intermediate said longitudinal ribs, each of the apices of said sinuous ribs having an elongated outer face extending tangentially to the side surface of the cylindrical body portion of the bar and terminating at a point adjacent to the base of the longitudinal ribs.

12. A reenforcing bar for concrete structures or the like, having a uniform cross sectional area throughout its length, comprising a cylindrical body portion, diametrically oppositely disposed sinuous ribs extending longitudinally of the bar, said sinuous ribs each having their apices widened and provided with outer surfaces extending tangentially to the side cylindrical surface of the body portion of the bar, and diametrically oppositely disposed straight longitudinal ribs between the sinuous ribs extending to the base of the apices of the sinuous ribs.

13. A reenforcing bar for concrete structures or the like, comprising a cylindrical body portion, and a sinuous rib formed thereon extending 1ongitudinally and laterally thereof on the cylindrical body portion the full diameter of the bar, said sinuous rib having the outer surfaces of its apices extending only to the lateral side cylindrical surfaces of the bar without projecting beyond the body portion.

14. A reenforcing bar for concrete structures or the like, comprising a cylindrical body portion, a straight longitudinal" rib extending outwardly therefrom on opposite surfaces of the bar, a sinuous rib extending from the top and bottom surfaces of the bar between the straight longitudinal ribs and spaced apart therefrom, said sinuous ribs extending from the base of one straight longitudinal rib on one side surface of the bar to the base of the straight longitudinal rib on the diametrically opposite side surface of the bar.

15. A reenforcing bar for concrete structures or the like, comprising a cylindrical body portion, a straight longitudinal rib extending from diametrically opposite surfaces thereof, and a sinuous rib spaced apart from the longitudinal ribs having the outer faces of its apices extending tangentially from the top of the rib to the side surface of the body portion of the bar and terminating at the base of the straight longitudinal ribs.

16. A reenforcing bar for concrete structures or the like, comprising a cylindrical body portion, a longitudinal rib projecting laterally therefrom on diametrically opposite side surfaces of the bar,

and a sinuous rib between said longitudinal ribs on the top and bottom surfaces of the bar, the outer surfaces of the apices of said sinuous ribs terminating tangentially on the cylindrical body portion of the bar at the base of said longitudinal ribs.

WILLIAM E. WHITE. 

